Buggy code:
public class GROneMain { public static void main ( String [ ] args ) throws Exception { GROneParser . just_initial = true ; if ( ( args . length ) < 2 ) { System . err . println ( "Usage:<seq2seq4repair_space>java<seq2seq4repair_space>GROneMain<seq2seq4repair_space>[smv_file]<seq2seq4repair_space>[ltl_file]" ) ; System . exit ( 1 ) ; } Env . loadModule ( args [ 0 ] ) ; Spec [ ] spcs = Env . loadSpecFile ( args [ 1 ] ) ; String out_filename = args [ 1 ] . replaceAll ( "\\.[^\\.]+$" , ".aut" ) ; SMVModule env = ( ( SMVModule ) ( Env . getModule ( "main.e" ) ) ) ; Spec [ ] env_conjuncts = GROneParser . parseConjuncts ( spcs [ 0 ] ) ; GROneParser . addReactiveBehavior ( env , env_conjuncts ) ; SMVModule sys = ( ( SMVModule ) ( Env . getModule ( "main.s" ) ) ) ; Spec [ ] sys_conjuncts = GROneParser . parseConjuncts ( spcs [ 1 ] ) ; GROneParser . addReactiveBehavior ( sys , sys_conjuncts ) ; System . out . print ( "====<seq2seq4repair_space>Constructing<seq2seq4repair_space>and<seq2seq4repair_space>playing<seq2seq4repair_space>the<seq2seq4repair_space>game<seq2seq4repair_space>======\n" ) ; long time = System . currentTimeMillis ( ) ; GROneGame g = new GROneGame ( env , sys ) ; long t1 = ( System . currentTimeMillis ( ) ) - time ; System . out . println ( ( "Games<seq2seq4repair_space>time:<seq2seq4repair_space>" + t1 ) ) ; if ( ( ( args . length ) == 3 ) && ( args [ 2 ] . equals ( "--safety" ) ) ) { System . out . println ( "Exporting<seq2seq4repair_space>safety<seq2seq4repair_space>constraints<seq2seq4repair_space>automaton..." ) ; PrintStream orig_out = System . out ; String safety_filename = args [ 1 ] . replaceAll ( "\\.[^\\.]+$" , "_safety.aut" ) ; System . setOut ( new PrintStream ( new File ( safety_filename ) ) ) ; g . generate_safety_aut ( g . getEnvPlayer ( ) . initial ( ) . and ( g . getSysPlayer ( ) . initial ( ) ) ) ; System . setOut ( orig_out ) ; } String debugFile = args [ 1 ] . replaceAll ( "\\.[^\\.]+$" , ".debug" ) ; <START_BUG> GROneDebug . analyze ( env , sys , debugFile ) ; <END_BUG> BDD all_init = g . getSysPlayer ( ) . initial ( ) . and ( g . getEnvPlayer ( ) . initial ( ) ) ; BDD counter_exmple = g . envWinningStates ( ) . and ( all_init ) ; if ( ! ( counter_exmple . isZero ( ) ) ) { System . out . println ( "Specification<seq2seq4repair_space>is<seq2seq4repair_space>unrealizable..." ) ; System . out . println ( "The<seq2seq4repair_space>env<seq2seq4repair_space>player<seq2seq4repair_space>can<seq2seq4repair_space>win<seq2seq4repair_space>from<seq2seq4repair_space>states:" ) ; System . out . println ( ( "\t" + counter_exmple ) ) ; System . out . println ( "====<seq2seq4repair_space>Computing<seq2seq4repair_space>counterstrategy<seq2seq4repair_space>=========" ) ; System . out . println ( "-----------------------------------------" ) ; PrintStream orig_out = System . out ; System . setOut ( new PrintStream ( new File ( out_filename ) ) ) ; g . printLosingStrategy ( counter_exmple ) ; System . setOut ( orig_out ) ; System . out . print ( "-----------------------------------------\n" ) ; long t2 = ( System . currentTimeMillis ( ) ) - time ; System . out . println ( ( "Strategy<seq2seq4repair_space>time:<seq2seq4repair_space>" + t2 ) ) ; System . out . println ( "=====<seq2seq4repair_space>Done<seq2seq4repair_space>==============================" ) ; System . exit ( 1 ) ; } System . out . println ( "Specification<seq2seq4repair_space>is<seq2seq4repair_space>realizable..." ) ; System . out . println ( "====<seq2seq4repair_space>Building<seq2seq4repair_space>an<seq2seq4repair_space>implementation<seq2seq4repair_space>=========" ) ; System . out . println ( "-----------------------------------------" ) ; PrintStream orig_out = System . out ; System . setOut ( new PrintStream ( new File ( out_filename ) ) ) ; g . printWinningStrategy ( all_init ) ; System . setOut ( orig_out ) ; System . out . print ( "-----------------------------------------\n" ) ; long t2 = ( System . currentTimeMillis ( ) ) - time ; System . out . println ( ( "Strategy<seq2seq4repair_space>time:<seq2seq4repair_space>" + t2 ) ) ; System . out . println ( "=====<seq2seq4repair_space>Done<seq2seq4repair_space>==============================" ) ; } }

Fix:
GROneDebug . analyze ( env , sys ) ;